Car roof



Dec. 2, i924. A 1,517,531

R. w. BURNETT CAR ROOF Filed Dec. 19. 192! Patented Dec., 2, i924.

can noon.

Application "filed December 19,

To all whom t may concer/n.'

Be it known that I, RICHARD W. BURNETT, a citizen of the United States of America, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful improvements in Car Roofs, of which the following is a specification, reference being had therein to the aocoinpanying drawings.

The invention relates to car roofs of the rigid all-metallic type and consists in various features of construction as hereinafter set forth.

In the drawings:

Figure l is a sectional perspective view showing a portion of the roof;

Figure 2 is a cross-section;

Figure 3 is a longitudinal section;

Figure l is an enlarged view of a portion of Figure 2.

ln the construction of car roofs it is usual to connect the side plates of the car by carlines and to attach the roofing sheets either rigidly or flexibly to said carlines. With my present construction the carlines, as a separate unit, are dispensed with, but the roof is thoroughly reinforced to talre care of both compression and tension stresses by the construction of the roofing sheets.

In detail, A are the side plates of a car which, as shown, are in the form of Z-bars. B are the roofing sheets which are curved to arch over the car between the side plates and are provided with down-turned portions secured to the web of the Z-bar. The sheets B at their opposite edges are provided with upturned flanges C and C', terminating respectively in the laterally-extending flanges D and D', the one overlapping the other. The upper flange D is further provided with a downturned end portion E which forms a water shed and protects the joint. The opstanding flanges C and C are rivet ed to each other, as indicated at F, and the downturned portions B are riveted to the web of the plate, as indicated at G. rllhus, the flanges C, C', D, D', and E, together with the plates B, form a truss or Z-bar construction which will impart great rigidity, not only to the roof but also the car frame.

In the forming of the sheets the structure is simplified by dispensing with the flange E on the downturned portion of the sheet. Additional reinforcement may, however, be

i321. seran No. 523,284.

provided by the use of a reinforcing member H, which is riveted to the flanges C and C extending around the bend and adjacent to the side plate.

vWhat l claim as my invention is:

l. ln a car roof., the combination with side plates, of metallic load sustaining roofing sheets arching between said side plates and rigidly secured thereto, opstanding flanges on the opposite edges of said sheets provided with laterally-extending flanges turned in the same direction, the lateral flange on one sheet overlapping the flangeon the opposite edge of the adjacent sheet and said upstanding flanges lying adjacent and being rigidly secured to each other. t

2. In a car roof, the combination with side plates, of metallic load sustaining roofing sheets arching between said sideplates and rigidly secured thereto, opstanding' flanges on the opposite edges of said sheets terminating in laterally-extending flanges turned in the saine direction, one of said flanges overlapping the flange of the adjacent sheet, corresponding to the opposite flange of the same sheet, and said overlap ping flange having a downturned portion for protecting the joint between the same and the lower flange, and rivets securing said upstanding flanges to each other.

3. In a car roof, the combination with side plates, of metallic load sustaining roofing sheets arching between said plates and rigidly secured thereto, upstanding flanges on the sides of said sheets abutting against the corresponding flanges of adjacent sheets and riveted thereto, said upstanding fianges hav` ing laterally-extending flanges turned in the saine direction, the one overlapping the other and having av downturned portion for protecting the joint therebetween, said laterally-extending flanges forming compression members for reinforcing said sheets.

4E. A single-course car roof comprising a plurality of self-sustaining roof sheets whose adjacent marginal portions are formed into stiffening ribs of substantially l.shaped section that are disposed web to web and are positively secured together to form rigid weather-proofing seams.

5. A single-course car roof comprising a plurality of self-sustaining roof sheets eX- tending from eaves to eaves and having their adjacent marginal portions formed into ribs of substantially L-shaped section that are disposed web to web and are rigidly secured together to 4form rigid weather-proofing sea-ms ythat function as carlines.

6. A single-course car rooitl comprising a plurality of self-sustaining roof sheets eX- tending from eaves to eaves and having their adjacent side marginal portions formed into upstanding seam flanges, each of said seam flanges comprising a substantially vertical Web portion at the top of which is a lateral-ly projecting flat flange portion, the seam flanges of Aadjacent sheets being rigidly se- Cured together web to web with their lateral flat flange portions .lapped to form Weatherproofing seams that constitute rigid trans- Verse stiening members for the car.

In testimony whereof I affix my signature.

RICHARD W. BURNETT. 

